The Clinical COPD Questionnaire (CCQ) is a short health status questionnaire for patients with COPD. The main purpose of this questionnaire is the measurement of health status of patients with breathing difficulties due to their illness. By measuring health status, the general practitioner, the specialist, and the patient get better information on the severity of symptoms and limitations caused by the disease. The effect of treatment on symptoms and limitations can be measured as well.

The main purpose of this questionnaire is measurement of disease related health status of the patient. The questionnaire does not intent to diagnose COPD. For diagnosing COPD a visit to the GP or specialist is necessary.  Measurement of lung function is also required.